Phase State and Dynamics of Fluids in Mesoporous Solids.

Fundamental understanding of the correlations between the phase state and dynamics of fluids confined to mesoporous solids is an important prerequisite for their optimal use in practical applications. The present contribution describes some recent progress in the exploration of such interrelations using nuclear magnetic resonance. In particular, transport properties of fluids during gas-liquid, solid-liquid and liquid-liquid transitions occurring in pore spaces of mesoporous solids are discussed and are shown to bear strong correlations. From the results presented it will, in particular, become evident that molecular diffusivity is a sensitive microscopic parameter not only to the thermodynamic state of the system, but also the history of its preparation. [ABSTRACT FROM AUTHOR]